package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.exceptions.LeaseException;
import com.atguigu.lease.common.jwts.JwtUtil;
import com.atguigu.lease.common.redis.RedisConstant;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.service.SystemUserService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.ObjectUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {
    @Autowired
    private RedisTemplate redisTemplate;

    @Autowired
    private SystemUserService systemUserService;

    @Override
    public CaptchaVo customCaptcha() {
        //生成验证码图片和正确验证码
        SpecCaptcha specCaptcha = new SpecCaptcha(130,48,4);
        //验证码内容类型
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);
        //获取验证图片
        String imageStr = specCaptcha.toBase64();
        String text = specCaptcha.text();
        //生成UUid
        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID().toString().replaceAll("-","");
        //将UUid + 正确验证码存储到redis
        redisTemplate.opsForValue().set(key,text,RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);
        //验证码图片和UUIDVo
        CaptchaVo captchaVo = new CaptchaVo(imageStr,key);
        return captchaVo;
    }

    @Override
    public String customLogin(LoginVo loginVo) {
        //验证码是否过期/是否正确
        String redisCode = (String) redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        if (ObjectUtils.isEmpty(redisCode)) {
            //验证码过期
            throw new LeaseException(ResultCodeEnum.APP_LOGIN_CODE_EXPIRED);
        }
        if (!redisCode.equalsIgnoreCase(loginVo.getCaptchaCode())) {
            //验证码错误
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }

        //检查账号
        LambdaQueryWrapper<SystemUser> systemUserLambdaQueryWrapper = new LambdaQueryWrapper<>();
        systemUserLambdaQueryWrapper.eq(SystemUser::getUsername,loginVo.getUsername());
        SystemUser systemUser = systemUserService.getOne(systemUserLambdaQueryWrapper);
        if (systemUser == null) {
            //账号错误
            throw  new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }

        //检查密码
        if (!systemUser.getPassword().equals(DigestUtils.md5Hex(loginVo.getPassword()))) {
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }

        //账号是否可用
        if (systemUser.getStatus() == BaseStatus.DISABLE) {
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }

        //生成token
        String token = JwtUtil.createToken(systemUser.getId(),systemUser.getUsername());
        return token;
    }
}
